Banquet
Goto the main lemur that is on the drum where all the food lies. Talk to him 10 times in a row to earn food. This can only be done 2 times.

Flying Bird Mini-game
When you are in level 3, go into the right subway entrance to find one of the arcade games.

Defeating leader Foosa:
When you are facing the leader Foosa at the very end when you are on a platform with spikes around you, he will first make the back catch on fire then start chasing you. He will get tired and give you a chance to hit him. After that, he will blow green air at you. Keep jumping. He will then go to the other side of the platform and start to give the vultures a signal to attack. Keep roaring at them. This process will repeat until the leader Foosa's life meter goes out. Sometimes the penguins will drop mangos.

Easy coins:
Get 30 coins, then go to the Zoovenir Shop. Buy the Coin Magnet, which will make nearby coins come to you.

Police:
When taking on the police you can use the statues, manholes, cages, and carts.

if you cannot download trainer then go to Chrome/Firefox's settings, specifically to the Privacy settings and simply unchecking the "Enable phishing and malware protection" option.

Some Game Trainers are sometimes reported to be a Virus or Trojan,
the most common is a keylogger called HotKeysHook or the file
has been packed/protected with VMProtect or Themida and
is recognized as Win32/Packed.VMProtect or Win32/Packed.Themida.
In ALL cases this is a FALSE ALARM as NONE
of the Game Trainers @ GCW contain known malicious code! More info in
the PC
Games FAQ!